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SiBE12-933_A
Troubleshooting
Service Diagnosis
199
4.18 Electrical Box Temperature Rise
Remote
Controller
Display
L3
Method of
Malfunction
Detection
An electrical box temperature rise is detected by checking the radiation fin thermistor with the
compressor off.
Malfunction
Decision
Conditions
With the compressor off, the radiation fin temperature is above 80°C.
The error is cleared when the temperature drops below 70°C.
Supposed
Causes
Radiation fin temperature rise due to defective outdoor unit fan
Radiation fin temperature rise due to short-circuit
Radiation fin thermistor defective
Connector in poor contact
Outdoor unit PCB defective